http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57201
minux <minux.ma at gmail dot com> changed:
What |Removed |Added
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CC| |minux.ma at gmail dot com
--- Comment #6 from minux <minux.ma at gmail dot com> 2013-05-08 13:21:15 UTC
---
A small standalone test case:
$ cat stdio.c
#include <test.h>
void f(void) {
stdout;
}
$ cat test.h
int *stdout;
#define stdout stdout
$ gcc -Wall -Werror -c stdio.c -I .
In file included from stdio.c:1:0:
stdio.c: In function ‘f’:
./test.h:2:16: error: statement with no effect [-Werror=unused-value]
#define stdout stdout
^
stdio.c:4:2: note: in expansion of macro ‘stdout’
stdout;
^
cc1: all warnings being treated as errors
$ gcc -Wall -Werror -c stdio.c -isystem .
$ gcc -Wall -Werror -c stdio.c -isystem . -ftrack-macro-expansions=0
In file included from stdio.c:1:0:
stdio.c: In function ‘f’:
./test.h:2:16: error: statement with no effect [-Werror=unused-value]
#define stdout stdout
^
stdio.c:4:2: note: in expansion of macro ‘stdout’
stdout;
^
cc1: all warnings being treated as errors
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-unknown-linux-gnu/4.8.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-4.8.0/configure --enable-languages=c,c++,go,lto
Thread model: posix
gcc version 4.8.0 (GCC)
